Yeah, I looked into those early on. Trouble is, how do you know it they're working? I suppose if you lose weight they must, but maybe a side by side test with a meter? Eat a ham samitch without using them, then another when using them?

Carb Blocker claims to block up to 38 grams per meal from being absorbed by your body. They state that you can cheat on a low carb diet. I tried a low carb blocker about 12 or 13 years ago. Didn't appear to make a difference on the meter after a meal . Tested the same food, with the blocker and without a few times. Because it was so long ago, I don't remember any more details. I didn't continue to use it, and I don't remember the brand. It might have some subtle effects, but I doubt there are any hidden revelations here.